Sorry, been a while. I could push the v1 .5 Beast coils to about 50watts to burn - 42 watts all day vape on 70/30 juice. The v2 coils I could vape comfortably at 47-48 watts and push to about 60 to burn. I have to say, I picked up a second tank and a short sleeve and have decided that after I got used to how cool they looked, especially the shorter sleeve they ultimately are a giant pain in the .... They leak for some reason like every OTHER time I fill which is strange since the technique never changes. The o-rings are terrible quality, every one is chewed to hell at this point. I gotta say I did expect more from a Beyond Vape product.
I have picked up a v2 .3 coil and I can find ally vape for more then couple hits without dry burning and I had always put 70/30 in with the .5 coil..IDK
Anyway the .3 was much better but I lost 90% flavor of any juice I tried in this tank with both coils compared to any rebuildable tank or RDA. I am a little disappointed, will pick up a few more .3s and see in the future how it goes.
I finally got my short sleeve and it looks awesome now. Maybe that's why I will keep it around for a while. I agree the orings are horrible they do get torn really easy and stretch out when I need them to stay in place.
The problem I think your having with the short sleeve is the oring for the inner barrel to a tach to the chamber it unscrews apart and it doesn't stay in place and took me forever to get it where it needed to be when I first got it and took it apart to clean it. I can see that causing a bad leak if it shifted on you from maybe taking the top off to refill or tanking the tank off to change the coil.
Check it out break the short sleeve down and the 5ml sleeve down completly you will see what I'm talking about right away. The 5ml sleeve doesn't have it. I believe the oring I'm talking about makes the seal for the chamber and barrel and/or seal for the coil to the chamber since it's soo short a d doesn't have the room to be the same design as the 5ml sleeve. I haven't messed with it since since it was such a pain and I don't really use the beast at all besides a few hits once a day or 2 just to see if my feelings gs change.